After the translucent app integrates unity, the solution to the transparent background of unity

Background transparency problem caused by translucent app

I encountered a problem a few days ago: the app is half-screen. In order not to make the other part of the background black, the following style attributes are set

	<item name="android:windowIsTranslucent">true</item>

At the same time, the app integrates unity, and unity uses a translucent background image.
After running, the unity part of the app shows through the desktop.

Solution:
First, if unity wants to have a hierarchical relationship, you need to set z

			 // surfaceView 透明化
    for (i in 0 until unityPlayer.childCount) {
        if (unityPlayer.getChildAt(i) is SurfaceView) {
            val tmp = unityPlayer.getChildAt(i) as SurfaceView
            tmp.holder.setFormat(PixelFormat.OPAQUE)
            tmp.setZOrderOnTop(true)
            tmp.setZOrderMediaOverlay(true)
        }
    }

In addition, if you want to be opaque, you need to set the format

You can see the source code of unity Player